Improvement in screw-powers



UNITED STATES JACOB HAEGE, OF

PATENT OFFICE.

SHILOH, ILLINOIS.

IMPROVEMENT IN SCREW-POWERS.

Specification forming part of Letters Patent No. 4 l ,296, dated January 19, 1864.

To all whom it may concern,.-

Beit known that I, JACOB HAEGE, of Shiloh, in the county of St. Clair and State of Illinois,have invented a new and Improved Screw Power for Elevating or Lifting Purposes; and I do hereby declare that the following is a full, clear, and exact description of the same, reference bein g had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a side sectional view of my invention, taken in the line x w, Fig. 2; Fig. 2, a plan or top view of the same, Fig. 3, a section of the same, taken in the' line y y, Fig. 2.

Similar letters of reference indicate corresponding parts in the several figures.

This invention consists in a novel arrangement and application of the screw and nut for elevating or lifting purposes, whereby the screw is allowed to adjust itself to its work and thereby avoid much friction hitherto attending the operation of the screw when applied to such purposes.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

Arepresents a framing, which may be constructed in any proper manner to support the working or operating parts of the device, and B is a bar placed longitudinally in the framing A, and suspended therein at its ends on pivots or journals c c to admit of said bar turning in the framing.

The bar B is slotted nearly its whole length, as shown at b, and to said bar there are secured a series of metal bearings, c, said bearings being attached to the sides of the bar B to receive the journals d of nuts C C C, in which screw-rods D D D are fitted and work, the screw-rods passing through the slot b in the bar B.

By this arrangement it will be seen that when an article is to be raised or lifted and attached to either of the screws the latter will be allowed to adj ust itself ,when screwed upward ina direction at right angles to the axis of the bar B, by the turning of the bar on its journals a a, or in a direction longitudinally with it by the turning of the nuts C on their journals d, and hence there will be no friction produced by a lateral binding of the screws against the nuts, a contingency which would occur with fixed nuts.

The simplest form of this invention is shown applied to the central screw-rod, D', the journals d of which are attached directly to the nut C', and the screw turned by a lever fitted on a square, e, at the top of the screw.

A preferable mode of application, however, is to have the journals d attached to or formed on a circular plate, f, provided with a circular recess, f', in which the lower end of the nut C is fitted, the screw being operated by turning the nut. This modification is shown at the left hand in Fig. l.

At the right hand of said figure another modification is shown, in which the lower end of the nut C is fitted in a circular chamber, g, formed in two plates, h h, each of which has a longitudinal half of a journal, d, attached to or formed with it, the two parts of the journals being kept in contact only by fitting in their bearings c, as shown clearly in Fig. 3.

The chambers or recesses f g form oil-chambers to keep the nuts properly lubricated and insure their easy turning on or in their respective plates.

The invention is extremely simple and eticient, and does not involve any material expense in the construction of a screwpower for elevating or lifting purposes.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The employment o'r use, in a screw-power for elevating or lifting purposes, of journals d, applied to nuts C C C, in which screw-rods D D D are fitted and work, in combination with the pivoted bar B and bearings c, all arranged to operate substantially as and for the purpose set forth.

JACOB HAEGE.

I/Vitnesses:

CHR. TREEZER, D. ODANrELs. 

